如何解决仅使用Python在FTP中下载昨天的文件
我想使用以下Python编程代码通过FTP仅下载昨天的文件,下面的代码下载所有文件。 我想对照昨天的日期检查代码中的上次修改时间戳,并仅自动下载昨天的文件。我真的需要帮助,感谢您的任何建议:
import ftplib
import os
from datetime import date
from dateutil import parser
FTP_HOST = "Remote IP"
FTP_USER = "Username"
FTP_PASS = "Password"
# some utility functions that we gonna need
def get_size_format(n,suffix="B"):
# converts bytes to scaled format (e.g KB,MB,etc.)
for unit in ["","K","M","G","T","P"]:
if n < 1024:
return f"{n:.2f}{unit}{suffix}"
n /= 1024
def get_datetime_format(date_time):
# convert to datetime object
date_time = datetime.strptime(date_time,"%Y%m%d%H%M%S")
# convert to human readable date time string
return date_time.strftime("%Y/%m/%d %H:%M:%S")
# initialize FTP session
ftp = ftplib.FTP(FTP_HOST,FTP_USER,FTP_PASS)
# force UTF-8 encoding
ftp.encoding = "utf-8"
# print the welcome message
print(ftp.getwelcome())
# change the current working directory to 'pub' folder and 'maps' subfolder
ftp.cwd("RemoteDirectory")
print("*"*50,"NLST","*"*50)
print("{:20} {:19}".format("File_Name","last_modified"))
for file_data in ftp.mlsd():
file_name,meta = file_data
# convert it to human readable format (i.e in 'KB','MB',etc)
last_modified = get_datetime_format(meta.get("modify"))
try:
ftp.cwd(file_name)
except Exception as e:
ftp.voidcmd("TYPE I")
last_modified = get_datetime_format(meta.get("modify"))
print(f"{file_name:20} {last_modified:19}")
ftp.retrbinary("RETR " + file_name,open(file_name,'wb').write)
# quit and close the connection
ftp.quit()
解决方法
基于Python Datetime: All Items From Yesterday,这应该可以做到:
yesterday = date.today() - timedelta(days=1)
for file_data in ftp.mlsd():
file_name,meta = file_data
last_modified = datetime.strptime(meta.get("modify"),"%Y%m%d%H%M%S")
if last_modified.date() == yesterday:
ftp.retrbinary("RETR " + file_name,open(file_name,'wb').write)
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